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  3. April 2015

RE: Power Handling program?

Good catch, Rob.  Thomas would not have been too happy after pulling the plug on the server.  

"Dang. Pulled the plug, got no message, AND the system went down - UPS must be bad."  ;-))

Roger Harman
COMMON Certified Application Developer – ILE RPG on IBM i on Power
OCEAN User Group
<http://www.ocean400.org>






----------------------------------------
To: midrange-l@xxxxxxxxxxxx
Subject: Re: Power Handling program?
From: rob@xxxxxxxxx
Date: Fri, 10 Apr 2015 16:09:56 -0400

Don't pull the plug on the server. Pull the plug on the UPS. In our case
the UPS a big someb... that has a 'breaker box' going into it with an arm
about the size of the old slot machines. I pull down on that to test it.


Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1
Group Dekko
Dept 1600
Mail to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com





From: Thomas Garvey <tgarvey@xxxxxxxxxx>
To: midrange-l@xxxxxxxxxxxx
Date: 04/10/2015 03:17 PM
Subject: Re: Power Handling program?
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>



I'm still confused about whether all partitions on the server that is
connected to the UPS get the message about the power outage.
In my case, all partitions are OS/400.
I can't think of a way to test for this, short of going up there and
pulling the plug on the server.


Best Regards,

Thomas Garvey
Corporate Scientist
Unbeaten Path International
630-462-3991
/www.unpath.com <http://www.unpath.com/>/

//




On 4/10/2015 10:22 AM, Jim Oberholtzer wrote:
Oh I really dislike the "shutdown with the last partition is off"
part......
The pain that happens if you really do need the machine in a standby
mode is
immense when that and partitions are set to start after power is
applied.
Maybe I run into it more often than others but those are really silly
settings in my opinion.

As to kicking off a script on the HMC to poll the partitions, I like
that
idea and I'll have to think that one through.

--
Jim Oberholtzer
Chief Technical Architect
Agile Technology Architects


-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of
Roberto José Etcheverry Romero
Sent: Friday, April 10, 2015 10:09 AM
To: Midrange Systems Technical Discussion
Subject: RE: Power Handling program?

Rob
I'm not sure how kosher it would be but you could invoke a script
running on
the hmc to poll the partitions' status and then shutdown. Or you could
set
the "shutdown system when last partition is off"...

Best regards

Roberto
On Apr 10, 2015 12:04 PM, <rob@xxxxxxxxx> wrote:

Let's break this down into two parts:

Part 1
<snip>
...When it receives the queue entry from the partition connected to
the UPS...
</snip>
Actually all partitions, IBM i and otherwise are connected to the UPS.

Part 2
<snip>
...(the program setup to watch QUPSMSGQ)...
</snip>
However, if you only have one lpar of IBM i who cares about QUPSMSGQ
that's another story. The others can be running fat dumb and happy
with a huge QUPSDLYTIM and rely upon this lpar to handle it all.
That's one way of doing things. I think I prefer each to handle
QUPSMSGQ.
Why?
- multithreading. While one lpar is shutting down stuff, especially
if there are delays and stuff built in, the other lpars can be doing
their own shutdowns.
- redundancy. Let's say you have your lpar with QUPSMSGQ in it doing
some restricted state operation or undergoing maintenance at the time
of power outage (Murphy can be a real SOB). Granted, the odds of you
being snuggled in bed with visions of sugar plums dancing in your head
while you have an lpar down are a little low but as a fellow with
multiple lpars I have been known to go to a child's sporting event
while a less critical lpar was doing a full system save and rclstg.

That, and any lpar of VIOS and AIX is going to get that UPS signal
anyway.

I do like Jim's idea of communicating to the HMC directly from IBM i.
But how do you put that delay in so you can get the lpar down and then
the HMC can shutdown the firmware?

Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1 Group Dekko Dept 1600
Mail to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com





From: "Steinmetz, Paul" <PSteinmetz@xxxxxxxxxx>
To: "'Midrange Systems Technical Discussion'"
<midrange-l@xxxxxxxxxxxx>
Date: 04/10/2015 10:39 AM
Subject: RE: Power Handling program?
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>



Jim,

Are you keying off of a specific message?
Why are you utilizing a remote data q?
Could you accomplish this with a WRKWCH?

Paul

-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of
Jim Oberholtzer
Sent: Friday, April 10, 2015 8:30 AM
To: 'Midrange Systems Technical Discussion'
Subject: RE: Power Handling program?

That I am aware of no, I've not seen examples of that type.

However it's fairly easy to do. I like remote data queues. Set up a
remote
data queue on each partition. The program that listens for that data
queue entry would be able to perform an orderly shutdown. When it
receives the queue entry from the partition connected to the UPS (the
program setup to watch QUPSMSGQ), it does its thing. This program
would start with the start up program and I usually use QUSRNOMAX job
queue.
When you think about it this can be used for many types of
interpartition communications limited only by your need and
imagination. The program can be written in any language (I use CL) so
use
your favorite.
--
Jim Oberholtzer
Chief Technical Architect
Agile Technology Architects


-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of
Thomas Garvey
Sent: Thursday, April 09, 2015 11:44 PM
To: Midrange Systems Technical Discussion
Subject: Power Handling program?

I've seen the suggested code IBM published for a Power Outage Handling
program when the message queue defined by the QUPSMSGQ system value is
allocated.
But what can be done when a UPS is supporting a server on which
multiple partitions are defined?
What is the connection actually made between the RS232 cable from the
UPS and the IBM i? It must be simply an IBM i port monitored by some
process in a single partition, right?
In this case, how would all the partitions be notified so they can be
shut down? And, if they could all be shut down, how would the server
itself be powered off, since PWRDWNSYS doesn't actually power the
server down (we do it through the HMC, which also manages another
server).

Is there an IBM document describing this circumstance?
--


Best Regards,

Thomas Garvey


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